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參數(shù)資料
| 型號(hào)： | MAX1678 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1-Cell to 2-Cell, Low-Noise, High-Efficiency, Step-Up DC-DC Converter |
| 中文描述： | 1節(jié)至2節(jié)電池、低噪聲、高效率、升壓型DC-DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 166K |
| 代理商： | MAX1678 |
M
1-Cell to 2-Cell, Low-Noise,
High-Effic ienc y, S tep-Up DC-DC Converter
6
_______________________________________________________________________________________
A
B
C
SWITCHING WAVEFORM
M
V
OUT
= 3.3V, V
BATT
= 1.2V, I
LOAD
= 10mA, C
OUT
= 10
μ
F,
L1 = SUMIDA CD43-470
A: LX, 2V/div B: V
OUT
, 50mV/div AC COUPLED
C: INDUCTOR CURRENT, 100mA/div
LINE-TRANSIENT RESPONSE
5
μ
s/div
Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 7 (Fixed Mode, 3.3V) or Figure 8 (Adjustable Mode), T
A
= +25°C, unless otherwise noted.)
Pin Desc ription
PIN
Battery-Power Input
BATT
1
FUNCTION
NAME
A
B
C
LOAD-TRANSIENT RESPONSE
M
V
OUT
= 3.3V, V
BATT
= 1.2V, C
OUT
= 10
μ
F,
L1 = SUMIDA CD43-470,
A: V
OUT
, 50mV/div, AC COUPLED B: INDUCTOR CURRENT,
C: LOAD, 2mA to 12mA 100mA/div
POWER-UP RESPONSE
100
μ
s/div
A
B
M
V
OUT
= 3.3V, V
BATT
= 1.2V, I
LOAD
= 10mA, C
OUT
= 10
μ
F,
L1 = SUMIDA CD43-470
A: V
OUT
, 50mV/div, AC COUPLED B: V
IN
, 1V/div, 1.2V to 2.2V
200
μ
s/div
A
B
C
M
V
OUT
= 3.3V, V
BATT
= 1.2V, I
LOAD
= 10mA, C
OUT
= 10
μ
F,
L1 = SUMIDA CD43-470
A: V
OUT
, 1V/div B: INDUCTOR CURRENT, 100mA/div
C: SHDN, 5V/div
100
μ
s/div
Power-Fail Input. When the voltage at PFI is below 614mV, PFO sinks current.
PFI
2
Active-Low Shutdown. Connect
SHDN
to BATT for normal operation.
SHDN
4
Open-Drain Power-Fail Output. PFO sinks current when PFI is below 614mV.
PFO
3
Ground
GND
6
Power Output and IC Power Input (bootstrapped). OUT is the feedback input for 3.3V operation. Connect
the filter capacitor close to OUT.
OUT
8
N-Channel MOSFET Switch Drain and P-Channel Synchronous-Rectifier Drain
LX
7
Dual-Mode Feedback Input. Connect FB to GND for fixed-output operation (3.3V). Connect FB to a feed-
back-resistor network for adjustable output voltage operation (2V to 5.5V). FB regulates to 1.23V.
FB
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1678ESA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1678EUA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1678EUA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1-2 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1678EUA+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1-2 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1678EUAT | 制造商:Maxim Integrated Products 功能描述: |
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